#ifndef __M_CONNECTION_H__
#define __M_CONNECTION_H__
#include "muduo/proto/codec.h"
#include "muduo/proto/dispatcher.h"

#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpClient.h"
#include "muduo/net/EventLoopThread.h"
#include "muduo/base/CountDownLatch.h"

#include "channel.hpp"
#include "worker.hpp"
#include "../mqcommon/mq_proto.pb.h"

class Connection{
public:
    using ptr = std::shared_ptr<Connection>;
    typedef std::shared_ptr<mymq::basicConsumeResponse> basicConsumeResponsePtr;
    typedef std::shared_ptr<mymq::basicCommonResponse> basicCommonResponsePtr;
    
    Connection(const std::string &sip, int sport,const AsyncWorker::ptr &worker):
        _latch(1), _client(worker->loopthread.startLoop(), muduo::net::InetAddress(sip, sport), "Client"),
        _dispatcher(std::bind(&Connection::onUnknownMessage, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3)),
        _codec(std::make_shared<ProtobufCodec>(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))),
        _worker(worker), _channel_manager(std::make_shared<ChannelManager>()){


        _dispatcher.registerMessageCallback<mymq::basicCommonResponse>(std::bind(&Connection::onCommonResponse, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        _dispatcher.registerMessageCallback<mymq::basicConsumeResponse>(std::bind(&Connection::onConsumeResponse, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));


        _client.setMessageCallback(std::bind(&ProtobufCodec::onMessage, _codec.get(), std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        _client.setConnectionCallback(std::bind(&Connection::onConnection, this, std::placeholders::_1));

        _client.connect();
        _latch.wait();//阻塞等待，直到连接建立成功
    }
        
    Channel::ptr openChannel(){
        //在channel里写好了
        Channel::ptr channel = _channel_manager->create(_conn, _codec);
        bool ret = channel->openChannel();
        if (ret == false){
            DLOG("打开信道失败！");
            return Channel::ptr();
        }
        DLOG("打开信道成功");
        return channel;
    }
    void closeChannel(const Channel::ptr &channel){
        channel->closeChannel();
        _channel_manager->remove(channel->cid());
        DLOG("关闭信道成功");
    }

private:

    void onCommonResponse(const muduo::net::TcpConnectionPtr& conn, const basicCommonResponsePtr& message, muduo::Timestamp){
        //1.找到信道
        Channel::ptr channel = _channel_manager->get(message->cid());
        if (channel.get() == nullptr){
            DLOG("未找到信道信息！");
            return ;
        }
        //2.将得到的响应对象，添加到信道的基础响应hash_map中
        channel->pushBasicResponse(message);
    }
    void onConsumeResponse(const muduo::net::TcpConnectionPtr& conn, const basicConsumeResponsePtr& message, muduo::Timestamp){
        //1.找到信道
        Channel::ptr channel = _channel_manager->get(message->cid());
        if (channel.get() == nullptr){
            DLOG("未找到信道信息！");
            return ;
        }        
        //2.封装异步任务（消息处理任务），抛入线程池
        _worker->pool.push([channel, message](){
            channel->consume(message);
        });
    }

     void onUnknownMessage(const muduo::net::TcpConnectionPtr& conn, const MessagePtr& message, muduo::Timestamp){
        LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
        conn->shutdown();
    }

    void onConnection(const muduo::net::TcpConnectionPtr &conn){
        if (conn->connected()){
            _latch.countDown();
            _conn = conn;
        }else{
            _conn.reset();
        }
    }

private:
    muduo::CountDownLatch _latch;//实现同步的
    muduo::net::TcpConnectionPtr _conn;//客户端对应的连接
    muduo::net::TcpClient _client;//客户端
    ProtobufDispatcher _dispatcher;//请求分发器
    ProtobufCodecPtr _codec;//协议处理器

    AsyncWorker::ptr _worker;
    ChannelManager::ptr _channel_manager;
};

#endif